TEAS Practice Test Science

Correct Answer: B

Rationale: The correct answer is B: Occipital lobe. The occipital lobe is primarily responsible for processing visual information. It contains the primary visual cortex which helps in interpreting visual stimuli. The frontal lobe (A) is responsible for executive functions, the parietal lobe (C) for processing sensory information, and the temporal lobe (D) for auditory processing and memory. Therefore, the occipital lobe is the correct choice for vision processing.

Correct Answer: B

Rationale: The correct answer is B: Fight infection. White blood cells are a crucial part of the immune system, responsible for identifying and attacking foreign invaders such as bacteria, viruses, and other pathogens. They play a key role in defending the body against infections and diseases. Choices A, C, and D are incorrect because white blood cells do not primarily function in transporting oxygen, producing antibodies, or regulating body temperature. Oxygen transport is mainly the role of red blood cells, antibody production is the function of B cells, and body temperature regulation involves processes such as sweating and shivering controlled by the hypothalamus.

Correct Answer: B

Rationale: The correct answer is B: Cerebellum. The cerebellum is responsible for coordinating muscle movements by receiving information from the sensory systems, spinal cord, and other parts of the brain to regulate motor movements. It plays a crucial role in maintaining balance, posture, and smooth coordination of voluntary movements. The other choices are incorrect because: A: The cerebrum is primarily involved in higher brain functions such as thinking, decision-making, and emotions. C: The thalamus acts as a relay station for sensory information but does not directly control muscle coordination. D: The medulla oblongata is responsible for regulating vital functions such as breathing, heart rate, and blood pressure, but not specifically muscle coordination.

Correct Answer: D

Rationale: The correct answer is D because keratin is a structural protein found in hair, nails, and the outer layer of the skin. It provides strength and protection to these structures. Choice A is incorrect because keratin is not an enzyme but a protein. Choice B is incorrect as keratin is not involved in neuromuscular function. Choice C is incorrect as the hypodermis is primarily composed of adipose tissue, not keratin. Therefore, the correct answer is D based on its role and location in the body.

Correct Answer: B

Rationale: The correct answer is B: Scapula. Flat bones are thin, flattened bones that provide protection and allow for muscle attachment. The scapula fits this description as it is a thin, flat bone located on the back of the shoulder. The other choices (A: Femur, C: Humerus, D: Tibia) are long bones that are not thin and flat like flat bones. The femur, humerus, and tibia are all weight-bearing bones with a different shape and function compared to flat bones.